Template:Selected anniversaries/April 17
1598: Priest and astromomer Giovanni Battista Riccioli born. He will experiment with pendulums and falling bodies, discuss arguments concerning the motion of the Earth, and introduce the current scheme of lunar nomenclature.
1627: Mathematician Pierre de Fermat writes a marginal note about a "Last Last Theorem" which will "surely solve all cases of crimes against mathematical constants, both past and future."
1938: Philosopher and author Kerry Wendell Thornley born. In 1962 he will write a manuscript, The Idle Warriors, about his aquaintence Lee Harvey Oswald.
1961: Bay of Pigs Invasion: A group of Cuban exiles financed and trained by the CIA lands at the Bay of Pigs in Cuba with the aim of ousting Fidel Castro.
1968: Industrialist, motivational speaker, and alleged crime boss Colonel Zersetzung takes possession of a large quantity of military-grade Clandestiphrine.
1969: Sirhan Sirhan is convicted of assassinating Robert F. Kennedy.